Age ≥ 22
BMI ≤ 50 kg/m²
ASA score ≤ 3
Benign rectal or sigmoid lesion(s) (e.g., adenomas, neuroendocrine tumors, etc.)
Lesion size ≤ 7 cm and covering ≤ 75% of colorectal circumference
Eligible for standard endoscopic submucosal dissection
Age ≥ 22
BMI ≤ 50 kg/m²
ASA score ≤ 3
Benign rectal or sigmoid lesion(s) (e.g., adenomas, neuroendocrine tumors, etc.)
Lesion size ≤ 7 cm and covering ≤ 75% of colorectal circumference
Eligible for standard endoscopic submucosal dissection
Anatomy unsuitable for endoluminal surgery
Active left-sided IBD
Active untreated infection
Vulnerable population
Severe illness limiting life expectancy
Pregnancy or breastfeeding
Enrollment in another clinical trial (within last 30 days)
EF ≤ 45, high cardiac or high pulmonary risk (unless cleared by cardiologist or pulmonologist, as applicable)
On blood thinners that cannot be safely weaned
Moderate to severe immunocompromised status